Saturday's trip to Middlesbrough marks Simon Grayson's 100th game in charge of Leeds United.
The 40-year-old took over at Elland Road in December 2008, opting to leave Blackpool to take up the job at the club he also served as a player.
He guided them to the League 1 Play-Offs at the end of the 2008/09 season before losing out to Millwall in the semi-finals. He did achieve promotion in May when they finished runners up to Norwich City in the League 1 table.
In total Grayson has won 55 of his 99 games in charge while 20 have ended all square.
Speaking ahead of the landmark match Leeds Chairman Ken Bates paid tribute to his Manager on Yorkshire Radio: "We won promotion, he's re-built the team, we've beaten Manchester United, drawn with Tottenham, and only just lost to Liverpool in a game that we might even have won.
"The percentage of victories is very rewarding. You have to say it is up there with Championship, Premier League form, and the record is very encouraging.
"Overall you have to say he has been very successful. And what is equally encouraging is that Simon says this is his club. He's a proud Yorkshireman and is very single-minded."
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